Deck 11: Emergency and Alternate Power Systems

Question 1

What is the main factor effecting the power output of a solar cell?

Answer 1

The power output of a solar cell depends upon the intensity of light received.

Question 2

In the case of wind turbines, grounding is not necessary for the wind machine tower nor the wind electric system.

Answer 2

False

Question 3

Flame detectors are required by codes.

Answer 3

False

Question 4

Photovoltaic cells are generally connected in ____________________to obtain the desired output voltage.

Question 5

A(n) ____________________ can be used to convert direct current to alternating current.

Question 6

___________________ are a type activated by visible light, light invisible to human eye, or flame flicker.

Question 7

When is equipment ground-fault protection required?

Question 8

____________________are installed to prevent toxic vapors from being moved from one part of the building to another.

Question 9

The boundary between the n-type and p-type semiconductors is called a tap.

Question 10

What is required in order for a photovoltaic system to maintain a constant power supply?

Question 11

The typical output of a small wind turbine is ____________________ current.

Question 12

Solar photovoltaic devices are comprised of which two types of semiconductors?

Question 13

What happens when light penetrates the semiconducting materials of solar photovoltaic systems?

Question 14

The wiring for emergency electrical systems is required to be run independently from normal power and lighting circuits.

Question 15

The ___________________ process was first discovered in the year 1839.

Question 16

A typical fuel cell power system produces a constant supply of electricity day and night.

Question 17

What prevents the electrons from traveling back across the junction to the p-type semiconductor in solar photovoltaic systems?

Question 18

Solid-state electronic devices are made of ____________________ materials such as silicon crystals containing an impurity that gives them an apparent charge, either positive or negative.

Question 19

A(n) ____________________ is an electrochemical device that converts hydrogen and oxygen into electricity, water, and heat.

Question 20

What are the two types of duct detectors?